Astra OPC

hedzball

Picked myself up a clean 07 opc for a bit of a weekend toy. Been a while since I had anything with a bit of poke in her.

going great for 3k kms then a vacuum hose under came loose created a kind of turkey noise for want of a better word when you lay off boost. popped that back in and happy days all sorted , may put a dab of glue back on it to keep it done mind.

so the car has a cone filter in her. Being paranoid to hearing every noise under light or heavy deacceleration i now hear a kind of chatter noise.. would I be right in thinking that the cone filter would be to blame? Chattering because the non oem filter hasn't got the pressure to let the recirc valve to open?

A dumping noise rather than the chatter would probably be a better word..

im just a shade paranoid

dar_cool

sounds normal on a turbo car, I wouldnt bother with the glue on the vacuum hose, replace it or a small cable tie to hold it on. Best of luck with it, Quick car them OPC's, few small bits and you have a 300bhp front wheel drive monster!!

edburg

Its the Cone filter as there no box now dampening out noise your hearing the Turbo and its bits working away.

If you dont like it buy a CDTi box mod, gives you the direct feed and better feel just with out the noise.


Bit of glue be the job, they all do that mine kept doing it to till I put glue on all joins.

Supergurrier

Chatter is completely normal on a cone filter setup

ciaran1995

Have a 2006 opc astra and having boost problems, the car drives prefect will start to hit boost gets up to 9psi then just won't go any further sometimes drops offs rapidly and becomes n/a almost,
the boost solenoid one the vacuum hoses was broken off that replaced it with a new genuine part, replaced any silcone hoses that seemed damaged, checked all the connections and last night,
but when i put the car into sport mode the car goes into limp mode nearly it works then you hear pops and power will drop dramatically, anyone have any ideas? could it be as simple as a vacuum hose on the wrong place or could it be a faulty sensor or any suggestions? any help would be a great help

edburg

Could be vacuum hoses as they can cause car to not fully boost and feel flat, but not bring car in to limp mode. Maybe coil pack related.

So first do pedal test, here is link to how 2 and list of code's to diagnose.

http://www.vxronline.co.uk/forum/showthread.php?33644-HOW-TO-check-error-codes


Let us know how ye get on.

ciaran1995

edburg wrote: »

Could be vacuum hoses as they can cause car to not fully boost and feel flat, but not bring car in to limp mode. Maybe coil pack related.

So first do pedal test, here is link to how 2 and list of code's to diagnose.

http://www.vxronline.co.uk/forum/showthread.php?33644-HOW-TO-check-error-codes


Let us know how ye get on.

thanks for the fast response yeah its driving me nuts was going to replace all the hoses to be safe and to have them all matching as someone had replaced some but not others, ill do a pedal test first tho cheers man

ciaran1995

edburg wrote: »

Could be vacuum hoses as they can cause car to not fully boost and feel flat, but not bring car in to limp mode. Maybe coil pack related.

So first do pedal test, here is link to how 2 and list of code's to diagnose.

http://www.vxronline.co.uk/forum/showthread.php?33644-HOW-TO-check-error-codes


Let us know how ye get on.

i have the trouble codes that are in the car, sorry thought that was something else yeah only codes I was getting for boost was when the solenoid was broke but soon i put a new one in the code went it self didn't have to clear it on tech 2.
what code I am getting now tho is
U2140-71 Invalid data from UEC (Underwood electrical centre) present

ciaran1995

ciaran1995 wrote: »

i have the trouble codes that are in the car, sorry thought that was something else yeah only codes I was getting for boost was when the solenoid was broke but soon i put a new one in the code went it self didn't have to clear it on tech 2.
what code I am getting now tho is
U2140-71 Invalid data from UEC (Underwood electrical centre) present

I'm also starting to get this alot when you start the car.it just cuts out or sometimes it just won't start when you twist the key, I think this may be down to dirt in the bottom of the ignition barrel on the pin as I've come across this last week ona zafria the central locking wouldn't work as the car thought there was a key in the ignition

edburg

Have you touched the UEC???


Not come across this before to be honest, if car was running fine before failed BCS then all I can suggest is going over the job double check BCS is correct, the route of vacuum hoses.

Attached a poor mans paint vacuum hose route map thats online, it might help.

ciaran1995

edburg wrote: »

Have you touched the UEC???


Not come across this before to be honest, if car was running fine before failed BCS then all I can suggest is going over the job double check BCS is correct, the route of vacuum hoses.

Attached a poor mans paint vacuum hose route map thats online, it might help.

I don't even know where the UEC is and basically the car was running 100% bar the bearings in the gear box gone I removed the engine to do the job and put a good few new parts in radiator boost pipes up rated bearings and casing loads of stuff then put it all back together no boost noticed the vacuum hose had broken so put it down to that bought a new boost solenoid and it literslly didn't make a slight difference, I said there last night ill see if i could have put the vacuum hoses on the wrong way but dont see how I could have as the connections are different sizes. I think just a chance I rotated the boost control as it says TOP > point down towards the drive shafts I thought maybe I could have twisted that the wrong way around but i knew inwasnt touched it but just in case flipped it and still the same as I found out that the top should be facing down

ciaran1995

ciaran1995 wrote: »

I don't even know where the UEC is and basically the car was running 100% bar the bearings in the gear box gone I removed the engine to do the job and put a good few new parts in radiator boost pipes up rated bearings and casing loads of stuff then put it all back together no boost noticed the vacuum hose had broken so put it down to that bought a new boost solenoid and it literslly didn't make a slight difference, I said there last night ill see if i could have put the vacuum hoses on the wrong way but dont see how I could have as the connections are different sizes. I think just a chance I rotated the boost control as it says TOP > point down towards the drive shafts I thought maybe I could have twisted that the wrong way around but i knew inwasnt touched it but just in case flipped it and still the same as I found out that the top should be facing down

the trouble code for UEC Wasn't in the car also when i first got it back driving only appeared in it after I plugged the car in after I noticed the boost solenoid was broken

edburg

OK then well can only guess something connected wrong way round, is there dash lights on when in limp like traction control. I am thinking AFM maybe wrong way around or damaged possibly regarding the running side.

UEC is fuse box essentially and is behind battery. Check fuses relays etc

I can only say recheck it all, to be honest. I normally use my tech2 and find something obvious in that area on mine.

ciaran1995

edburg wrote: »

OK then well can only guess something connected wrong way round, is there dash lights on when in limp like traction control. I am thinking AFM maybe wrong way around or damaged possibly regarding the running side.

UEC is fuse box essentially and is behind battery. Check fuses relays etc

I can only say recheck it all, to be honest. I normally use my tech2 and find something obvious in that area on mine.

this is where it gets complicated as it has a super chip fitted and running around 270bp and i was told the mad sensor was mapped out of the car but I think the maf sensor is just broken as all the lights that appear with a broken maf are disconnected but i can't see this been the issue as the car was running absolutely prefect before hand with the sensor not connected so dont think this is the issue and to be sure i have tired a new maf sensor aswel but the car runs awful with it connected

edburg

Try coil pack out then and male sure plugs are gm plugs, no need for special plugs or anything till over 350 bhp.

After this I think its worth getting on to vxr owners pages on facebook as above explanation for tuning sounds all wrong.

I suspect you mean o2 sensor faults were mapped out for an exhaust not maf.

What I will say is I am not sure superchips do a 95 octane map and you maybe want a custom map to run our fuel to avoid potential damage of running a 99 Oct map long term.

ciaran1995

edburg wrote: »

Try coil pack out then and male sure plugs are gm plugs, no need for special plugs or anything till over 350 bhp.

After this I think its worth getting on to vxr owners pages on facebook as above explanation for tuning sounds all wrong.

I suspect you mean o2 sensor faults were mapped out for an exhaust not maf.


What I will say is I am not sure superchips do a 95 octane map and you maybe want a custom map to run our fuel to avoid potential damage of running a 99 Oct map long term.

yeah the spark plugs are only 3 months old and full service done with all genuine parts everythingI genuine fitted into it. I rang the crowd that put the super chip.into the car and they say they dont map anything or blank lights or any of that they literally just pop it on like plug and play basically, but saying that they told me the owner who had it at the time was pumping money into it so don't know if he went and got more done to it after that. by the looks of it someone's had the head completely rebuilt and timing belt done so mind is blown at the minute can't imagine its abything major as it was running prefect before removing the engine so just process of alienation
just wondering if anyone knew what could what possibly wrong 🀔

edburg

Well coil pack only thing can think of. Could be ecu fault not talking to UEC but I'd expect that to be complete fail.

Coil packs are delicate things that can break if your to rough taking them off. Mine got damp once after a cleaning session and had a hissy fit misfiring no power etc.

Still think if MAF, dash lights and things like that have been mapped out then the car been in hands of a cowboy, nothing like that needs to be removed in a remap, other than widening the peramaters for O2 readings with cars on a sports cat n exhaust.

ciaran1995

edburg wrote: »

Well coil pack only thing can think of. Could be ecu fault not talking to UEC but I'd expect that to be complete fail.

Coil packs are delicate things that can break if your to rough taking them off. Mine got damp once after a cleaning session and had a hissy fit misfiring no power etc.

Still think if MAF, dash lights and things like that have been mapped out then the car been in 8hands of a cowboy, nothing like that needs to be removed in a remap, other than widening the peramaters for O2 readings with cars on a sports cat n exhaust.

yeah I'll give the coil pack a check so you reckon it can't keep up while the cars hitting boost ? yeah the car has a full exhaust system on it work cost about €1300 give or take have receipts there from soouhans but no doubt a cowboy has owed the car before me, ill give the coil pack a look and might even swap one into it see if it makes any difference